72729529 has 2 divisors, whose sum is σ = 72729530. Its totient is φ = 72729528.

The previous prime is 72729521. The next prime is 72729577. The reversal of 72729529 is 92592727.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72590400 + 139129 = 8520^2 + 373^2 .

It is a cyclic number.

It is not a de Polignac number, because 72729529 - 2³ = 72729521 is a prime.

It is not a weakly prime, because it can be changed into another prime (72729521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36364764 + 36364765.

It is an arithmetic number, because the mean of its divisors is an integer number (36364765).

Almost surely, 2^72729529 is an apocalyptic number.

It is an amenable number.

72729529 is a deficient number, since it is larger than the sum of its proper divisors (1).

72729529 is an equidigital number, since it uses as much as digits as its factorization.

72729529 is an evil number, because the sum of its binary digits is even.

The product of its digits is 158760, while the sum is 43.

The square root of 72729529 is about 8528.1609389129. The cubic root of 72729529 is about 417.4171210102.

The spelling of 72729529 in words is "seventy-two million, seven hundred twenty-nine thousand, five hundred twenty-nine".